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Finding the Fourth Proportional to 121,924, 182,719.95 and 68,641.39

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Solution

The fourth proportional to 121,924, 182,719.95 and 68,641.39 is: 102,868.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,924 : 182,719.95 = 68,641.39 : x
  2. Step 2: Convert to fraction form
    121,924/182,719.95 = 68,641.39/x
  3. Step 3: Cross multiply
    121,924x = 182,719.95 × 68,641.39
  4. Step 4: Simplify right side
    121,924x = 12,542,151,348.73
  5. Step 5: Solve for x
    x = 12,542,151,348.73/121,924
  6. Step 6: Final answer
    x = 102,868.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.